Question

c₆h₁₂o₆ + 6o₂ → 6co₂ + 6h₂o + energy

1. in the above chemical reaction:

a. what are the reactants of the reaction?
b. what are the products of the reaction?
c. how many molecules are there for each of:
i. c₆h₁₂o₆ (glucose):
ii. co₂ (carbon dioxide)
iii. o₂ (oxygen)
iv. h₂o (water)
bsc 2010c/chapter 2 questions - dr. nimri
page 2|2

Explanation:

Part a

Step1: Recall reactant definition

Reactants are on left of reaction arrow.

Step2: Identify from equation

Given reaction: $\ce{C6H12O6 + 6O2 -> 6CO2 + 6H2O + Energy}$, so reactants are $\ce{C6H12O6}$ (glucose) and $\ce{O2}$ (oxygen).

Step1: Recall product definition

Products are on right of reaction arrow (excluding energy as it's not a molecule here).

Step2: Identify from equation

From $\ce{C6H12O6 + 6O2 -> 6CO2 + 6H2O + Energy}$, products are $\ce{CO2}$ (carbon dioxide), $\ce{H2O}$ (water).

Step1: Understand coefficient meaning

In a chemical equation, the coefficient (number before formula) represents number of molecules.

Step2: Analyze each compound

• i. $\ce{C6H12O6}$: Coefficient is 1 (implied), so 1 molecule.
• ii. $\ce{CO2}$: Coefficient is 6, so 6 molecules.
• iii. $\ce{O2}$: Coefficient is 6, so 6 molecules.
• iv. $\ce{H2O}$: Coefficient is 6, so 6 molecules.

Answer:

$\ce{C6H12O6}$ (Glucose) and $\ce{O2}$ (Oxygen)

Part b